NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2013-06-21 579-288 not yet reported which blocks → Comwave Networks 160G Chateauguay —
2013-06-21 612-352 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9631 TWINCITIES MN
2013-06-21 616-368 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HOLLAND MI
2013-06-21 786-483 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J MIAMI FL
2013-06-21 803-470 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F COLUMBIA SC
2013-06-21 916-540 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 RSVL MAIN CA
2013-06-21 980-352 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E LOWELL NC
2013-06-20 343-265 not yet reported which blocks → Comwave Networks 160G Deseronto —
2013-06-20 343-266 not yet reported which blocks → Comwave Networks 160G Kingston —
2013-06-20 343-267 not yet reported which blocks → Comwave Networks 160G Napanee —
2013-06-20 343-272 not yet reported which blocks → Comwave Networks 160G Northbrook —
2013-06-20 343-273 not yet reported which blocks → Comwave Networks 160G Plevna —
2013-06-20 469-416 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2013-06-20 469-418 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2013-06-20 484-273 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 ALLENTOWN PA
2013-06-20 484-862 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2013-06-20 512-375 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 AUSTIN TX
2013-06-20 605-968 7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 HURON SD
2013-06-20 647-483 not yet reported which blocks → ISP Telecom Inc. 4727 Toronto —
2013-06-20 786-801 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MIAMI FL
2013-06-20 786-803 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2013-06-20 807-861 not yet reported which blocks → Bell Mobility 6574 Fort Frances —
2013-06-20 902-599 not yet reported which blocks → Bell Mobility Aliant 329A Kentville —
2013-06-20 910-758 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J FAYETTEVL NC
2013-06-20 980-938 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CHARLOTTE NC
2013-06-19 469-291 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2013-06-19 702-906 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2013-06-19 916-472 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2013-06-18 210-906 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SANANTONIO TX
2013-06-18 234-229 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MANCHESTR OH
2013-06-18 234-252 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LOUISVILLE OH
2013-06-18 234-813 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MOGADORE OH
2013-06-18 281-662 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 CHANNELVW TX
2013-06-18 385-325 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F SPRINGVL UT
2013-06-18 409-205 0–9 XXXall 10 · 5 holders which blocks → SOUTHWESTERN BELL 9533 SABINEPASS TX
2013-06-18 440-560 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → GREAT WAVE BROADBAND SERVICES, LLC 032H ROCK CREEK OH
2013-06-18 440-990 0–9 XXXall 10 · 3 holders which blocks → GREAT WAVE BROADBAND SERVICES, LLC 032H ASHTABULA OH
2013-06-18 469-353 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2013-06-18 469-804 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DALLAS TX
2013-06-18 507-591 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 MARSHALL MN
2013-06-18 512-872 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2013-06-18 740-770 0XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FRANKFORT OH
2013-06-18 740-940 0XXX7XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MASSIEVL OH
2013-06-18 810-216 0–9 XXXall 10 · 4 holders which blocks → TELNET WORLDWIDE, INC. 817J PORT HURON MI
2013-06-18 832-792 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2013-06-17 267-789 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J PHPHSBZN43 PA
2013-06-17 424-321 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 EL SEGUNDO CA
2013-06-17 717-969 0–9 XXXall 10 · 8 holders which blocks → COMCAST IP PHONE, LLC 318J HANOVER PA
2013-06-17 832-751 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2013-06-17 909-485 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARROWHEAD CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.